The study of effects of p-PCH on fish and wildlife was limited for two decades by
the fact that it was impossible to assess the toxicological implications of
constantly changing mixtures and the need to monitor for total concentrations of p
-PCH.

When such idle periods exceed the inactivity timer value, the UE will be moved
out of the Cell-DCH state to a URA-PCH state where the UE is still connected but
it has no dedicated channels assigned to it. A UE in this state needs to be paged
...